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INVESTMENT MANAGEMENT AND OTHER FEES (Details) - Disaggregation of Revenue - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2021 | Mar. 31, 2020
Disaggregation of Revenue [Line Items] |  |  |  |
Total Operating Revenue | $ 6,355 | $ 914 | $ 14,321 | $ 2,605
Administrative Service [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 51 | 39 | 153 | 128
Investment and Advisory Services [Member] | Investment Management Services [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 6,304 | 875 | 14,168 | 2,477
U.S. Global Investors Funds [Member] | Administrative Service [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 51 | 39 | 153 | 128
U.S. Global ETFs [Member] | Investment and Advisory Services [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 5,170 | 201 | 11,107 | 455
Investment and Advisory Services [Member] | U.S. Global Investors Funds [Member] | Base Advisory Fee [Member[ |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 978 | 753 | 2,781 | 2,413
Investment and Advisory Services [Member] | U.S. Global Investors Funds [Member] | Investment Performance [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 156 | $ (79) | $ 280 | $ (391)

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